BIM Standard IFC
IFC is the core technology behind building information modeling, focusing on information description and communication. It is composed of multiple schemas that follow object-oriented principles and a hierarchical structure. Each level’s categories can reference the same or lower levels but never higher ones.
The IFC architecture is organized into four conceptual layers: the Resource Layer, Core Layer, Interoperability Layer, and Domain/Application Layer. This object-oriented design allows each layer to utilize resources through referencing and inheritance, addressing the diverse needs throughout the engineering lifecycle.
1. Resource Layer
The Resource Layer is the foundation of the IFC architecture. It defines the most basic concepts and objects that exist independently without relying on other classes. In IFC Release 2.0, this layer includes measurement data, utility data, geometry data, as well as properties and property types of objects.
2. Core Layer
The Core Layer forms the second level and provides the infrastructure for the IFC object model. Categories defined here can be referenced and specialized by all layers above it, including the Interoperability and Domain/Application Layers. The Core Layer consists of two main parts:
(1) Kernel
The Kernel encompasses all fundamental concepts necessary for the IFC object model. It defines the structure and composition of objects and includes essential abstract concepts such as object relationships, type definitions, properties, and rules.
(2) Extensions
Extensions build upon the Kernel by introducing specialized concepts required for operation and facility management. Each extension is a specific subclass derived from the Core’s categories.
3. Interoperability Layer
The Interoperability Layer defines shared concepts and object modules that facilitate communication between different domain and application layers. Projects within this layer include Shared Building Elements, Shared Building Services Elements, Shared Component Elements, Shared Management Elements, and Shared Facilities Elements.
4. Domain/Application Layer
The Domain/Application Layer is the highest level of the IFC architecture. It provides detailed object information tailored to various fields such as Building Controls, Plumbing and Fire Protection, Structural Elements, Structural Analysis, HVAC, Electrical Systems, Architecture, Construction Management, and Facilities Management.
That concludes our overview of the BIM Standard IFC. I hope this article has been helpful to everyone!
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